SiteBuilder is not open-source, but it is free.

No software is really free, because your web developer's time isn't free. Open source software is free to download, in the same way that we do not charge a fee to buy a copy of SiteBuilder. You just pay for our time to set-up the software to your requirements and pay a fixed monthly fee that covers general system maintenance, security patches, SSL certificates, feature enhancements, hosting on dedicated servers, back-ups and support.

SiteBuilder provides an intuitive, secure and time saving website management system coupled to a personable and premium service, as we believe in a direct and honest relationship with our customers. Switch Apps has invested in building SiteBuilder fully in-house from the ground up and hosting the application on secure, reliable and dedicated hosting. Charging for our services means we have a stable and transparent business model allowing us to provide the highest levels of service in the most time-efficient manner.